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  • Flood regime of rivers in the Danube river basin [Elektronski vir] : the Danube and its basin - Hydrological monograph, Follow-up volume IX
    There is a perception that extreme climatic and hydrological events have become more frequent in recent years and suggestions that this phenomenon may be due to man-induced global warming. That ... perception is (sometimes arguably) supported by some scientific evidence, but is still not widely recognised. Trends in fluvial flooding are more difficult to detect, as changes in factors such as land use, reservoirs, drainage or flood alleviation schemes will impact on the flood regime in addition to changes due to the climate. This study is looking for evidence of changes in flood regimes of rivers in the Danube river basin, an increase in the frequency and magnitude of high flow in the observation period. The flow regime of a river is the quantity, duration and seasonal pattern of flows. The flow regime of a river system influences the flora and fauna present in a river ecosystem, it also influences the lifecycle activities of fauna such as spawning and the survival of larvae and juveniles. Human activities such as abstraction of water, disposal of excess water, irrigation and clearing of vegetation can change the natural flow regime. These activities can lead to either an increase or a decrease in quantity of flow as well as changing the timing, duration and seasonal pattern of ecologically important flow events. Climate change is also contributing to changed flow regimes. The flow regime of a waterway is an important indicator of its health and forms part of the assessment of waterways. In particular, the last decade has seen a significant focus on understanding the response mechanism of runoff to climate change and human activity (e.g., the construction of reservoirs to store and/or control the flow of water). A significant number of the major rivers have been dammed, including the Danube. Depending on the size and purpose of the dam, their construction can lead to different impacts on the downstream river flow regime. For example, different impacts result from changes in the variability, magnitude, timing, and frequency of flow. In the presented follow-up volume 9 of the Danube Hydrological Monograph the authors have assessed the changes in flood regimes in the Danube River Basin from the longterm point of view using hydrological information from gauging stations in the whole river basin. Therefore, the database was created of the as long as available time series of the mean daily discharge and maximum annual discharge. The mean monthly and annual discharges were processed from the daily data. Twenty stations were selected lying on the Danube banks with time series of high quality. Experts of participating countries have selected other 65 stations lying on the tributaries of the Danube, preferably from the profiles which are not disturbed by human activities and where the long time series exist. It was not possible to fulfil this condition in all stations. The data collection, their processing and database creation are described in chapter 1. In the second chapter the authors focused on collection of information about major historical floods on the Danube which are not included in the measured time series. One way how to obtain such information is gathering information on historical flood marks preserved in the settlements along the Danube channel. In this respect, there exist very big differences between the Upper Danube, Middle Danube and Lower Danube. There exist many flood marks even of the August 1501 flood in the cities of the Upper Danube in Germany and Austria. The historical flood marks are evidence that at least 3 higher floods than those of the last 100 years did occur between 1501 and 1900. Flood regime of rivers in the Danube River basin The Danube and its Basin - Hydrological Monograph, Follow-up Volume IX 214 The homogeneity of the data time series was tested in Chapter 3. The fourth chapter deals with the identification of long-term trends and of the multi-annual variability of the mean annual discharges, as well as of the maximum annual discharges. It is necessary to take into account the natural multiannual variability of runoff in the Danube Basin. Results, which seem to show trends in short time series up to 60 years, can be only manifestation of natural long-term cycles, in fact. The fifth chapter summarizes the results of the statistical analyses of selected characteristics of maximum monthly and daily discharge. The sixth chapter is focused on proposition of unified methodology of T-year design discharge assessment in the whole Danube River Basin. The seventh chapter presents the results of statistical analyses concerning the coincidence of flood waves on the Danube and its tributaries. The eights chapter is focused on assessment of the design flood waves on the Danube. The final Chapter 9 presents the results of the regionalization of selected flow characteristics in the Danube Basin. The significance of the presented work is in unified processing of all the collected data from the whole Danube River Basin. The presented Follow-up volume of the Danube Hydrological Monograph is result of 10-years collaboration of wide team of hydrologists from 11 countries of the Danube collaboration in the framework of the International Hydrological Programme of UNESCO (IHP UNESCO). Publication of the monograph was partially supported by Slovak MVTS project "Flood regime of rivers in the Danube River basin", the Slovak Science Granting Agency under the contract No. VEGA 2/0004/19 and by the Slovak National Commission for UNESCO.
    Vrsta gradiva - znanstvena monografija ; neleposlovje za odrasle
    Izdaja - First
    Založništvo in izdelava - Bratislava : Slovak acedemy of sciences, Institute of hydrology : Regional co-operation of the Danube countries with the Frame of the International hydrological programme of IHP - UNESCO, cop. 2019
    Jezik - angleški
    ISBN - 978-80-89139-43-9
    COBISS.SI-ID - 8949089

    Povezava(-e):

    http://147.213.100.3:81/danubeflood/PDF/FinalReport2019.pdf

Nobena knjižnica v sistemu COBISS.SI nima izvoda tega gradiva (gre za elektronski vir ali pa poleg tiskane verzije obstaja tudi elektronska).
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